What is Cloud Computing ?
Cloud computing is a way of offering on-demand services that extend the traditional capabilities of a computer or network. The term ‘cloud computing’ also refers to the technology that makes cloud work. Instead of buying, owning, and maintaining physical data centers and servers, we can access technology services, such as computing power, storage, and databases, on an as-needed basis from a cloud provider like Amazon Web Services (AWS), Microsoft Azure and Google Cloud. Cloud computing relies on virtualization to gain efficiencies and cost savings.
Virtualization enables cloud providers to make maximum use of their data center resources. Virtualization technology allows corporates to apply a cloud based delivery model to their on-site infrastructure to improve internal security, workflows and performance. Corporates can also virtualize their infrastructure, software or platforms to deliver a range of services to their end-users.
Types Of Cloud
Public Cloud
In public cloud computing a service provider makes resources available to the end users over the Internet. The public cloud provider owns, manages, and assumes all responsibility for the data centers, hardware, and infrastructure on which its customers’ workloads run, and it typically provides high-bandwidth network connectivity to ensure high performance and rapid access to applications and data. These resources might be accessible for free, or access might be sold according to subscription-based or pay-per-usage pricing models.
Advantages of Public Cloud
1. In public cloud everything is maintained by cloud service provider.
2. It offer better flexibility approach to users.
3. Public cloud is easy to integrate.
4. Accessible by general public, So there is no limit to number of users.
Disadvantages of Public Cloud
1. Customer has no control of resources.
2. Public Cloud is less secure because of resources are shared publicly.
3. Performance depends upon the speed of internet.
Private Cloud
Private cloud is a cloud environment in which a company creates its own cloud environment that only it can utilize as an internal enterprise resource. Private cloud is also known as an internal cloud or corporate cloud. A private cloud is typically hosted on-premises in the customer’s data center. Private cloud deliver a higher level of security and privacy through both company firewalls and internal hosting to ensure operations and sensitive data are not accessible to third-party providers.
Advantages of Private Cloud
1. It provides a high level of security and privacy to the users.
2. It offers better performance with improved speed and space capacity.
3. Private cloud offer better flexibility approach to customers.
4. Everything is controlled and managed by the organization itself.
Disadvantages of Private Cloud
1. It is accessible within the organization, so the area of operations is limited.
2. Highly trained and skilled people required to operate the private cloud services.
3. It also required a high speed internet for operations.
Hybrid Cloud
Hybrid cloud environment is a combination of both public and private cloud environment. A hybrid cloud connects an organization’s private cloud services and public clouds into a single, flexible infrastructure for running the organization’s applications and workloads. Hybrid cloud services are powerful because they give businesses greater control over their private data. An organization can store sensitive data on a private cloud and simultaneously leverage the robust computational resources of a managed public cloud.
Advantages of Hybrid Cloud
1. Hybrid cloud environment provides an excellent way to reduce the risk.
2. Hybrid cloud environment is more secure as compared to public cloud environment.
3. Hybrid cloud provides instantly scale up or down to handle excess capacity.
4. Hybrid cloud helps us to deliver new products and services more quickly.
Disadvantages of Hybrid Cloud
1. Hybrid cloud environment is less secure as compared to private cloud environment.
2. Hybrid cloud has more than one type of cloud deployment model, So it is very complex to manage.
Community Cloud
The cloud service shares among various organizations and companies which belong to the same community with the common concerns. This can manage either by the third party or internally. In Community cloud resources and costs are shared among several different organizations who have common service needs. The Community Cloud is very adaptive in nature such that there is a very gradual migration process. Moreover, there are more and more resources available in the data center and migrations can be done at many levels.
Advantages of Community Cloud
1. Community cloud allows us to share cloud resources and infrastructure among various organizations.
2. Community cloud provides collaborative and distributive environment.
3. Community cloud is less expensive because the whole cloud is shared by several organizations or communities.
4. Handling and managing the community cloud is easy.
5. It is highly available and reliable because of replication of data is done in the cloud to protect it against the disaster.
Disadvantages of Community Cloud
1. Community cloud environment is less secure as compared to private cloud environment.
2. The fixed amount of data storage and bandwidth is shared among all community members.
3. If one organization is attacked by hacker then others also affected.
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